Buttons use script or java to do their jobs.

Java Downloads for All Operating Systems

Make sure your Java (Not JavaScript) is up to date Verify Java and Find Out-of-Date Versions {web link}

Version 8 Update 111 Release date October 18, 2016 http://java.com/en/download/manual.jsp

Thank you very much for your comprehensive reply. Unfortunately it did not solve my problem. I rolled Firefox back to the previous version and tested. Same result. I went to Amazon and did not experience this problem. It appears that perhaps there is something about Walmart.com and Firefox that don't get along at this time.

Java and JavaScript are different languages. To avoid confusion, see:

• http://kb.mozillazine.org/JavaScript_is_not_Java

You can check the Web Console (Firefox/Tools > Web Developer) for error messages.

• https://developer.mozilla.org/Tools/Web_Console
• https://developer.mozilla.org/Tools/Network_Monitor

You can use "Ctrl+F5" or "Ctrl+Shift+R" to reload the page and bypass the cache to generate a fresh log.

• https://developer.mozilla.org/Tools/Network_Monitor

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• Hold down the Shift key and left-click the Reload button
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Command + Shift + R" (Mac)

Clear the cache and remove the cookies from websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Clear the cache":

• Firefox/Options/Preferences -> Advanced -> Network -> Cached Web Content: "Clear Now"

"Remove the cookies" from websites that cause problems.

• Firefox/Options/Preferences -> Privacy -> "Use custom settings for history" -> Cookies: "Show Cookies"

If the above doesn't help,

Remove History For One Site Open the History Manager <Control><Shift> H. In the search bar, enter the name of the site. Right click on one of the listings and select Forget About This Site. This should remove all information, including any passwords / settings.